5507981 has 4 divisors (see below), whose sum is σ = 5642364. Its totient is φ = 5373600.

The previous prime is 5507969. The next prime is 5507989. The reversal of 5507981 is 1897055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1932100 + 3575881 = 1390^2 + 1891^2 .

It is a cyclic number.

It is not a de Polignac number, because 5507981 - 2⁶ = 5507917 is a prime.

It is a super-2 number, since 2×5507981² = 60675709392722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5507989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67130 + ... + 67211.

It is an arithmetic number, because the mean of its divisors is an integer number (1410591).

Almost surely, 2^5507981 is an apocalyptic number.

It is an amenable number.

5507981 is a deficient number, since it is larger than the sum of its proper divisors (134383).

5507981 is a wasteful number, since it uses less digits than its factorization.

5507981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134382.

The product of its (nonzero) digits is 12600, while the sum is 35.

The square root of 5507981 is about 2346.9088179987. The cubic root of 5507981 is about 176.6027564407.

The spelling of 5507981 in words is "five million, five hundred seven thousand, nine hundred eighty-one".